Journal of Materials Chemistry A
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2024
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IF 10.7
Xiaosai Hu,Haoran Cao,Man He,Junrui Miao,Yanyan Jin,Hongming Lv
Polyethyleneimine (PEI), with an abundance of amino groups, demonstrates a strong affinity for heavy metal ions, thus emerging as a promising candidate for applications in wastewater treatment. However, the inherent water solubility of PEI limits its direct use for the remediation of heavy metals. Contrary to the previous synthetic approaches that employed PEI solely as a surface modifier, the present work utilizes the PEI polymer as the fundamental matrix for the development of water-insoluble polyethyleneimine derivative adsorbents (PAPEI). This innovative method eliminates the need for additional solid substances, enabling the effective elimination of Hg(II) from aqueous solutions. PAPEI adsorbents achieved a high adsorption capacity of 1832 mg g−1 for Hg(II) with a good selectivity (distribution coefficient Kd = 3.2 × 104 mL g−1). The adsorption process between the PAPEI adsorbents and Hg(II) was primarily attributed to chelation affinity. This work proposed a straightforward approach for designing PAPEI adsorbents that can efficiently remove Hg(II) from aqueous environments.
研究领域:
环境科学
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材料科学
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高影响因子
MACROMOLECULAR RESEARCH
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2013
·Vol. 21
·期 7
·726-731
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IF 1.639
Huang Hui,Fan Yifan,Wang Junwei,Gao Haoqi,Tao Shiying
A water-insoluble β -cyclodextrin ( β -CD) polymer was synthesized by reacting β -CD with hexamethylene diisocyanate, and its adsorption kinetics and thermodynamics for phenol from aqueous solution was investigated. The kinetics of adsorption followed the pseudo-second-order model and the adsorption isotherms could be well fitted by the Freundlich adsorption equation. The values of thermodynamic parameters demonstrated that the adsorption was a physisorption in a spontaneous and exothermic process.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2014
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IF 4.331
Shidong Tian,Yucui Hou,Weize Wu,Shuhang Ren,Jianguo Qian
The capture of SO 2 by ionic liquids (ILs) has drawn much attention all over the world. However, ILs can absorb not only SO 2 but also water from flue gas. The removal of water from ILs is necessary for reusing the absorbent. In order to reduce the energy costs of removing water, it would be helpful to weaken the interactions between ILs and water. In this work, two kinds of hydrophobic task-specific ILs, 1-(2-diethyl-aminoethyl)-3-methylimidazolium hexafluorophosphate ([Et 2 NEmim] [PF 6 ]) and 1-(2-diethyl-aminoethyl)-1-methylpyrrolidinium hexafluorophosphate ([Et 2 NEmpyr][PF 6 ]), were designed and synthesized. Thermal stability and physical properties of the ILs were studied. Furthermore, the application of the ILs for the capture of SO 2 and the absorption mechanism were systematically investigated. It has been found that both of the ILs are immiscible with water, and [Et 2 NEmim][PF 6 ] has much lower viscosity, much higher thermal stability and much higher SO 2 absorption rate than [Et 2 NEmpyr][PF 6 ]. [Et 2 NEmim][PF 6 ] shows high SO 2 absorption capacities up to 2.11 mol SO 2 per mole IL (pure SO 2 ) and 0.94 mol SO 2 per mole IL (3% SO 2 ) under hydrous conditions at 30 °C. The result suggests that [Et 2 NEmim][PF 6 ] is a promising recyclable absorbent for the capture of SO 2 .
研究领域:
化学工程
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环境科学
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DOI
PubMed
高影响因子
BIOCHIMICA ET BIOPHYSICA ACTA-GENERAL SUBJECTS
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2013
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IF 3.848
Jie Yuan,Yiwen Chen,Guangqi Zhou,Haijiang Chen,Haichun Gao
Background Bacteria adopt a variety of lifestyles in their natural habitats and can alternate among different lifestyles in response to environmental changes. At high cell densities, bacteria can form extracellular matrix encased cell population on submerged tangible surfaces (biofilms), or at the air–liquid interface (pellicles). Compared to biofilm, pellicle lifestyle allows for better oxygen access, but is metabolically more costly to maintain. Further understanding of pellicle formation and environmental cues that influence cellular choices between these lifestyles will definitely improve our appreciation of bacterial interaction with their environments. Methods Shewanella oneidensis cells were cultured in 24-well plates with supplementation of varied divalent cations, and pellicles formed under such conditions were evaluated. Mutants defective in respiration of divalent cations were used to further characterize and confirm unique impacts of iron. Results and conclusions Small amount of Fe 2 + was essential for pellicle formation, but presence of over-abundant iron (0.3 mM Fe 2 + or Fe 3 + ) led to pellicle disassociation without impairing growth. Such impacts were found due to S. oneidensis -mediated formation of insoluble alternative electron acceptors (i.e., Fe 3 O 4 ) under physiologically relevant conditions. Furthermore, we demonstrated that cells preferred a lifestyle of forming biofilm and respiring on such insoluble electron acceptors under tested conditions, even to living in pellicles. General significance Our finding suggests that bacterial lifestyle choice involves balanced evaluation of multiple aspects of environmental conditions, and yet-to-be-characterized signaling mechanism is very likely underlying such processes.
研究领域:
微生物学
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环境科学
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DOI
PubMed
高影响因子
Foods
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2024
·Vol. 13
·期 4
·624
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IF 4.7
Kuimin Yang,Jieqiong Yao,Kaixin Shi,Chenxi Yang,Yang Xu,Peipei Zhang,Siyi Pan
To improve the application potential of pomelo peel insoluble dietary fiber (PIDF) in emulsion systems, acetylation (PIDF-A), cellulase hydrolysis (PIDF-E), and wet ball milling (PIDF-M) were investigated in this paper as methods to change the emulsification properties of PIDF. The impact of the methods on PIDF composition, structure, and physicochemical properties was also assessed. The results demonstrated that both acetylation modification and cellulase hydrolysis could significantly improve the emulsification properties of PIDF. The emulsions stabilized with PIDF-A and PIDF-E could be stably stored at 25 °C for 30 d without phase separation at particle concentrations above 0.8% (w/v) and had higher storage stability: The D4,3increments of PIDF-A- and PIDF-E-stabilized emulsions were 0.98 μm and 0.49 μm, respectively, at particle concentrations of 1.2% (w/v), while the storage stability of PIDF-M-stabilized emulsion (5.29 μm) significantly decreased compared with that of PIDF (4.00 μm). Moreover, PIDF-A showed the highest water retention capacity (21.84 g/g), water swelling capacity (15.40 mL/g), oil retention capacity (4.67 g/g), and zeta potential absolute (29.0 mV) among the PIDFs. In conclusion, acetylation modification was a promising method to improve the emulsifying properties of insoluble polysaccharides.Keywords:pomelo peel insoluble dietary fiber;acetylation;cellulase hydrolysis;wet ball milling;emulsifying properties
研究领域:
食品科学
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化学工程
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2012
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IF 2.487
Xinlai Wei,Qiang Lu,Xianwei Sui,Zhi Wang,Ying Zhang
Water-insoluble pyrolytic cellulose with similar appearance to pyrolytic lignin was found in cellulose fast pyrolysis oil. The influence of pyrolysis temperature on pyrolytic cellulose was studied in a temperature range of 300–600 °C. The yield of the pyrolytic cellulose increased with temperature rising. The pyrolytic cellulose was characterized by various methods. The molecular weight distribution of pyrolytic cellulose was analyzed by gel permeation chromatography (GPC). Four molecular weight ranges were observed, and the M w of the pyrolytic cellulose varied from 3.4 × 10 3 to 1.93 × 10 5 g/mol. According to the elemental analysis (EA), the pyrolytic cellulose possessed higher carbon content and lower oxygen content than cellulose. Thermogravimetric analysis (TGA) indicated that the pyrolytic cellulose underwent thermo-degradation at 127–800 °C and three mass loss peaks were observed. Detected by the pyrolysis gas chromatography–mass spectrometry (Py-GC/MS), the main pyrolysis products of the pyrolytic cellulose included saccharides, ketones, acids, furans and others. Fourier transforms infrared spectroscopy (FTIR) also demonstrated that the pyrolytic cellulose had peaks assigned to C O stretching and glycosidic bond, which agreed well with the Py-GC/MS results. The pyrolytic cellulose could be a mixture of saccharides, ketones, and their derivatives.
研究领域:
生物质能
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材料化学
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DOI
高影响因子
FOOD CHEMISTRY
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2019
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IF 5.399
Kanghui He,Qi Li,Yan Li,Bin Li,Shilin Liu
In this work, water-insoluble bamboo shoot dietary fiber (BSDF) was prepared, and used as plant food particle stabilizer for oil-in-water (O/W) Pickering emulsions. The obtained plant food particle had novel emulsification ability, the prepared emulsions were stable against coalescence for at least 4 weeks and also insensitive to pH, ionic strength and pasteurization conditions. The BSDF suspensions and BSDF-stabilized O/W emulsions both exhibited shear-thinning behaviors; moreover, both viscosity and module were increased with the increase of BSDF contents. The surface coverage of emulsions was positively correlated with the content of BSDF suspensions. It indicated that the dietary fibers from bamboo shoot had a soft nature and suitable shape to produce stable Pickering emulsions, which could be used as food-grade particles for applications of food and cosmetics industries.
研究领域:
食品科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
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2025
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IF 12.4
Wei Liang,Qian Lin,Wenqing Zhao,Haiyan Gao,Jie Zeng,Wenhao Li
Comparison and revealing the potential cryoprotective effect of fermented insoluble dietary fibers (IDFs) on frozen dough and the modulation mechanism of its qualities. This study prepared a reconstituted dough system with different IDFs (CK, MF) and various ratios (1% and 3%) thereof, based on a freeze-thaw cycle (0, 7, 14-F/T). The results revealed that IDF-dough has a lower freezing/syneresis rate and freezable water content than the control. The addition of MF mitigates CK's deterioration of the dough cross-section and network. IDF addition promoted dough conversion to a viscoelastic state and reduced uneven water distribution during the F/T cycle. Moreover, IDF induced free sulfhydryl release from gluten and decreased GMP content, thereby promoting fraction conversion to LPP and LMP and mitigating F/T-induced depolymerization of gluten structure. In particular, CK addition shifted the protein conformation towards irregular curls, while MF promoted the formation of more flexible β-turn structures. The blue shift and intensity enhancement of λmax indicate that IDF promotes tryptophan release and strengthens the hydrophobic microenvironment. Notably, CK interactions in the system are primarily driven by hydrophobic forces, while MF relies on hydrogen bonding. Further, the potential of MF as a dietary additive was evaluated by the Mantou model. The findings provide a foundational understanding of the practical application of dietary fiber in frozen pasta products, thereby facilitating the valorization of wheat bran by-products and advancing a circular economy in the cereal-based industry.
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高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
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IF 6.2
Bing Zheng,Li Liu,Jun Li,Yi Chen,Jianhua Xie,Xiaole Zhao,Jinhua Feng,Qing Zhou,Xiaobo Hu,Qiang Yu
Bound polyphenols (BPs) are critical to the anti-obesity effects of dietary fiber. However, their role in dietary-fiber-mediated intestinal barrier protection remains unclear. In this study, we demonstrated that rice bran insoluble dietary fiber (RIDF) alleviated intestinal barrier damage in high-fat-diet (high-fat diet)-fed mice, and this beneficial effect was dependent on BPs, as it was attenuated in mice treated with polyphenol-removed dietary fiber (RIDF_DF). Furthermore, fecal supernatant transplantation from RIDF-treated (not RIDF_DF-treated) mice alleviated obesity and reshaped the gut microbiota in recipient mice. Additionally, the fecal supernatant enhanced the intestinal barrier function and augmented the synthesis of short-chain fatty acids. Notably, butyrate administration upregulated intestinal tight junction proteins in Caco-2 cells and HFD-fed mice and increased Oscillospira abundance. Mechanistically, butyrate inhibited apoptosis and promoted autophagy, accompanied by alterations in the AMPK-Akt signaling pathway. These results indicate that BPs contribute to the ameliorative effect of RIDF on intestinal damage.
研究领域:
营养科学
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胃肠病学
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微生物组研究
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分子生物学
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DOI
PubMed
高影响因子
Foods
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2022
·Vol. 11
·期 21
·3482
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IF 5.561
Yongmei Li,Lu Li,Jinhong Tian,Fengxin Zheng,Hui Liao,Zean Zhao,Yanyu Chen,Jianxin Pang,Ting Wu
Hyperuricemia (HUA), characterized by abnormal serum uric acid (UA) levels, is recognized as an important risk factor for hyperuricemic nephropathy (HN), which is strongly linked to gut microbiota. This study investigated the protective effects and regulatory mechanisms of insoluble fiber from barley leaves (BL) against HN, induced by adenine (Ad) and potassium oxonate (PO). The results showed that BL dramatically reduced the levels of serum UA and creatinine (CR) and alleviated renal injury and fibrosis. Moreover, BL modulated oxidative stress and downregulated the expression of urate transporter 1 (URAT1) and glucose transporter 9 (GLUT9) in the kidneys of mice with HN. In addition, the 16S rRNA sequence data showed that BL also increased the relative abundance of short-chain fatty acids (SCFAs)-producing bacteria, includingBacteroides,Alloprevotella, andEisenbergiella. Besides, BL treatment also increased SCFAs levels. Of interest, the application of SCFAs in hyperuricemic mice effectively reduced their serum UA. Furthermore, SCFAs dose-dependently inhibited URAT1 and GLUT9 in vitro and potently interacted with URAT1 and GLUT9 in the docking analysis. When taken together, our results indicate that BL and its metabolite SCFAs may be potential candidates for relieving HUA or HN.Keywords:barley leaf;hyperuricemic nephropathy;gut microbiota;SCFAs;URAT1;GLUT9
研究领域:
营养学
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药理学
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胃肠病学
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肾病学
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Chunyan Hou,Lianjia Zhao,Muhua Ji,Jingjing Yu,Yan Di,Qian Liu,Zhengmao Zhang,Lijun Sun,Xuebo Liu,Yutang Wang
Phenolics in bound form extensively exist in cereal dietary fiber, especially insoluble fiber, while their release profile in gastrointestinal tract and contribution to the potential positive effects of dietary fiber in modulating gut microbiota still needs to be disclosed. In this work, the composition of bound phenolics (BPs) in triticale insoluble dietary fiber (TIDF) was studied, and in vitro gastrointestinal digestion as well as colonic fermentation were performed to investigate BPs liberation and their role in regulating intestinal flora of TIDF. It turned out that most BPs were unaccessible in digestion but partly released continuously during fermentation. 16 s rRNA sequencing demonstrated that TIDF possessed prebiotic effects by promoting anti-inflammatory while inhibiting proinflammatory bacteria alongside boosting SCFAs production and antioxidative BPs contributed a lot to these effects. Results indicated that TIDF held capabilities to regulate intestinal flora and BPs were important functional components to the health benefits of cereal dietary fiber.
研究领域:
食品科学
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营养学
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微生物学
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产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2024
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IF 11.4
Juanlong Li,Yezi Hu,Zewen Shen,Huihui Jin,Rong He,Wenkun Zhu,Guixia Zhao,Zhuoyu Ji,Bin Ma,Xiangke Wang
ABSTRACT Extracting uranium (U(VI)) from fluoride-rich radioactive wastewater is of great significance for the development of nuclear energy and environmental remediation. The presence of thermodynamically stable [UO 2 F n ] 2−n (n= 0, 1, 2, 3, 4) aqueous complexes in fluoride-rich U(VI)-containing wastewater significantly hinders the efficiency of uranyl extraction and recovery using conventional methods. In this study, we report a direct precipitation method using deferiprone ligands for efficient uranyl extraction from fluoride-rich wastewater that offsets the preparation of solid materials. The deferiprone ligands exhibited exceptional chelating ability competing toward F − . In simulated 2.1 × 10 -4 mol/L U(VI) wastewater with F − concentrations ranging from 1 to 10 g/L, adjusting the amount of deferiprone ligands enabled a high U(Ⅵ) precipitation rate of 97.60% to 86.90%, correspondingly. A remarkable 99.71% recovery of U(Ⅵ) from real fluoride-rich alkaline wastewater was achieved within 2 hours. Detailed investigations revealed that the competitive chelating by deferiprone ligands results in the formation of insoluble U(VI)-deferiprone complexes ([(UO 2 )(H 2 O)(C 7 NO 2 H 8 ) 2 ]·4H 2 O), driven by π-π stacking interactions, electrostatic attractions, and intermolecular hydrogen bonds. Given the cost-efficiency and excellent radiation resistance of deferiprone ligands, this efficient and straightforward precipitation approach holds great promise for practical applications in U(VI) remediation and resource recovery from fluoride-rich wastewater.
研究领域:
环境科学
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核化学
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废水处理
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材料科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）